The effects of microalgae-based fertilization of wheat on yield, soil microbiome and nitrogen oxides emissions

Shrestha, Ram; Ghazaryan, Lusine; Poodiack, Ben; Zorin, Boris; Gross, Avner; Gillor, Osnat; Khozin‐Goldberg, Inna; Gelfand, Ilya

doi:10.1016/j.scitotenv.2021.151320

Cited by 16 publications

(4 citation statements)

References 47 publications

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“…The soil microbiome showcased great resiliency; the whole bacterial community composition did not change as a function of fertilizer rate or type. This finding is supported by a recent study which found that the wheat soil microbiome did not change when fertilized with urea compared to a microalgae-based biofertilizer [56]. Further, Lourenço et al [57] determined that while soil microbiomes were initially altered by the application of organic and inorganic N, they eventually recovered their original soil microbial community.…”

Section: Discussionmentioning

confidence: 65%

Soil Bacteriome Resilience and Reduced Nitrogen Toxicity in Tomato by Controlled Release Nitrogen Fertilizer Compared to Urea

Rohrbaugh,

Dixon,

Delgado

et al. 2023

Applied Microbiology

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Controlled release fertilizers (CRFs) mitigate negative effects of high nitrogen (N) fertilization rates, such as N toxicity and soil N loss. However, it is unknown if potentially toxic rates of CRF and quick release fertilizer differentially affect soil bacterial communities. To examine potential N toxicity effects on soil microbial communities, we grew tomato (Solanum lycopersicum “Rutgers”) for eight weeks in soils that were fertilized with high levels of quick release or controlled release urea and in soils with either low or high initial microbial N competitor populations. In both soils, we observed N toxicity in urea-fertilized tomatoes, but toxicity was ameliorated with CRF application. Controlled release fertilization increased soil N retention, thereby reducing soil N loss. While N toxicity symptoms manifested in the plant, the soil microbiome was only minorly affected. There were subtle differences in soil bacterial populations, in which nitrifying bacteria accumulated in soils fertilized at high N rates, regardless of the type of N fertilizer used. Ultimately, CRF reduced plant N toxicity symptoms but did not change the soil microbiome compared to quick release urea. These results show that while there are clear benefits of CRF regarding N toxicity tolerance on crops, the soil microbiome is resilient to this abiotic stressor.

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Section: Discussionmentioning

confidence: 65%

Soil Bacteriome Resilience and Reduced Nitrogen Toxicity in Tomato by Controlled Release Nitrogen Fertilizer Compared to Urea

Rohrbaugh,

Dixon,

Delgado

et al. 2023

Applied Microbiology

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“…Our results showed that microalgae application did not increase N 2 O emissions from hawthorn orchard soil compared with conventional fertilization alone, except H-R treatment (Figs 3A and 4A ). A recent study showed that N 2 O emissions were 1.5−3.0 times lower in wheat soils fertilized by green microalgae compared to inorganic fertilizer, and ascribed it mainly to lower soil inorganic nitrogen availability with microalgae application [ 32 ]. In this study, except for soil NH 4 + −N of M-R treatment, the microalgae application did not significantly change both NH 4 + −N and NO 3 − −N ( Fig 6A and 6B ).…”

Section: Discussionmentioning

confidence: 99%

“…A handful of studies reported that, soils inoculations with N 2 -fixing cyanobacteria significantly reduced CH 4 emissions compared to uninoculated soils in rice fields [ 29 – 31 ]. Shrestha et al [ 32 ] found that N 2 O emissions in application of green microalgae biomass were 1.5 to 3-folds lower compared to urea fertilization in a wheat field, and ascribed to overall lower mineral nitrogen availability in soils fertilized by microalgae. However, other studies showed that applying green microalgae biomass significantly increased the emissions of soil N 2 O [ 33 , 34 ] and CO 2 [ 33 ], but had no significant effect on CH 4 emissions [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Microalgae-based biofertilizer improves fruit yield and controls greenhouse gas emissions in a hawthorn orchard

Ma,

Li,

Han

et al. 2024

PLoS ONE

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Raising attentions have focused on how to alleviate greenhouse gas (GHG) emissions from orchard system while simultaneously increase fruit production. Microalgae-based biofertilizer represents a promising resource for improving soil fertility and higher productivity. However, the effects of microalgae application more especially live microalgae on GHG emissions are understudied. In this study, fruit yield and quality, GHG emissions, as well as soil organic carbon and nitrogen fractions were examined in a hawthorn orchard, under the effects of live microalgae-based biofertilizer applied at three doses and two modes. Compared with conventional fertilization, microalgae improved hawthorn yield by 15.7%−29.6% with a maximal increment at medium dose by root application, and significantly increased soluble and reducing sugars contents at high dose. While microalgae did not increase GHG emissions except for nitrous oxide at high dose by root application, instead it significantly increased methane uptake by 1.5−2.3 times in root application. In addition, microalgae showed an increasing trend in soil organic carbon content, and significantly increased the contents of soil dissolved organic carbon and microbial biomass carbon, as well as soil ammonium nitrogen and dissolved organic nitrogen at medium dose with root application. Overall, the results indicated that the live microalgae could be used as a green biofertilizer for improving fruit yield without increasing GHG emissions intensity and the comprehensive greenhouse effect, in particular at medium dose with root application. We presume that if lowering chemical fertilizer rates, application of the live microalgae-based biofertilizer may help to reduce nitrous oxide emissions without compromising fruit yield and quality.

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“…To estimate the soil NO emissions, a dynamic chamber was placed on the same soil collars as the accumulation chamber (for details see [ 41 ]). The lid of the dynamic chamber allowed the free exchange of air between the chamber and the atmosphere while it was connected to the NO–NO 2 –NO x analyzer (42 i TL; ThermoFisher Scientific).…”

Section: Methodsmentioning

confidence: 99%

Soil nitric and nitrous oxide emissions across a nitrogen fertilization gradient in root crops: A case study of carrot (Daucus carota) production in Mediterranean climate

Lumor,

Zurgil,

Gelfand

2023

PLoS ONE

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Insufficient knowledge about soil nitrous and nitric oxide (N2O and NO) emissions from vegetable production limits our ability to constrain their atmospheric budget. Carrots (Daucus carota) are a globally important, heavily managed and irrigated, high-value horticultural crop. Although intensively fertilized carrots may be an important hot-spot source of N2O and NO emissions, we have little information on the response of soil N2O emissions to fertilization and no information on the NO emissions response. To fill this knowledge gap, we conducted a replicated field experiment on mineral soil in the Negev Desert. We grew carrots with drip irrigation, applying five fertilization levels, ranging between 0 and 400 kg N ha−1. During one growth season we estimated responses of the soil N2O and NO emissions, partial crop N balance, and carrot yields to incremental fertilization levels. Carrot yield increased with increasing fertilization from 0 to 100 kg N ha−1 and exhibited no further response thereafter. Soil N2O and NO emissions were similar at all fertilization levels and did not differ significantly from those in the unfertilized control. The estimated N budget was negative for all fertilization levels. Carrots incorporated 30–140 kg N ha−1 into their belowground biomass and 120–285 kg N ha−1 into their aboveground biomass per season.

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The effects of microalgae-based fertilization of wheat on yield, soil microbiome and nitrogen oxides emissions

Cited by 16 publications

References 47 publications

Soil Bacteriome Resilience and Reduced Nitrogen Toxicity in Tomato by Controlled Release Nitrogen Fertilizer Compared to Urea

Soil Bacteriome Resilience and Reduced Nitrogen Toxicity in Tomato by Controlled Release Nitrogen Fertilizer Compared to Urea

Microalgae-based biofertilizer improves fruit yield and controls greenhouse gas emissions in a hawthorn orchard

Soil nitric and nitrous oxide emissions across a nitrogen fertilization gradient in root crops: A case study of carrot (Daucus carota) production in Mediterranean climate

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